Erection unit for a building floor slab and the erection method thereof

ABSTRACT

An erection unit for a building floor slab is disclosed, which includes a load-bearing member for lifting the floor slab. Said load-bearing member is higher than a plane where the floor slab lies and fixed in a wall and connected with the floor slab by the aid of a traction member. A method for erecting the floor slab with said erection unit is disclosed, which includes the following processes: installing the floor slab mould; connecting the upper end of the traction member to the load-bearing member above the floor slab; placing the lower end of the traction member on the height where the floor slab is located; then pouring concrete; dismantling the mould and installing the next lower layer after the floor slab has hardened; taking off the traction member after the floor has solidified to a strength enough to support its deadweight.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to an erection unit for a building floor slab andthe erection method thereof, and more particularly to an erection unitfor multiple floor slabs and the erection method thereof.

2. Description of the Prior Arts

The floor slab is used to vertically divide the space of a building intoplural floors according to customer's requirements. At present, thefloor slab of most buildings is made of concrete, as shown in FIG. 1,and the erection method is to install the next upper floor slab afterthe load-bearing structure (such as concrete structure) for each flooror the load-bearing structure for the whole building has been completed.After the concrete of the lower floor is poured, it needs to wait for acertain period of time until the concrete has hardened enough to bear acertain weight. And then support frame can be installed on this floorslab so as to carry out another installation for the next upper floorslab. However, this erection method still has two disadvantages whichare described as follows: 1) it has to wait for a certain period of timebefore the floor slab hardens, then the next upper floor slab can beinstalled. Furthermore, it is time-consuming since the support frame andthe floor slab mould should be assembled and dismantled repeatedly aftereach floor is completed. 2) It will have a bad effect on the structuralstrength of the floor slab since the lower floor slab has to bear theweight of the plural upper floor slabs, the support frame and the floorslab mould when multiple floor slabs are installed synchronously, whichwill likely lead deformation of the floor slab, as shown in FIG. 1.Accordingly, the requirement for structural strength of the supportframe will be relatively higher. In view of the above-mentionedconditions, an improved erection method for a building floor slab isdisclosed in SIPO Patent No. 01,129,796 (Oct. 22, 2001) titled “anerection unit for a building floor slab and the erection methodthereof”. This method is used to install the floor slab downwardlystarting from the upper floor to lower floor of a building, whichgenerally includes the following steps: fixing a first plurality ofpositioning members on the load-bearing structure of the building,placing the floor slab mould on the first plurality of positioningmembers, the floor slab mould is supported with a support structurewhich is hung on the first plurality of positioning members through atraction member, then pouring concrete; installing a second plurality ofpositioning members at the position where the lower floor slab liesafter the concrete has cured to a certain extent, hanging the supportstructure on the positioning member of the lower floor through thetraction member, then taking off the first plurality of positioningmembers of the upper floor slab, under the effect of gravity and by theaid of the traction of the traction member, the floor slab mould islowered to the position where the lower floor slab lies and placed on anupper end of the positioning member, then pouring the concrete. Withthis erecting method, multiple floor slabs can be installedconcurrently. Furthermore, the assembly and disassembly of the floorslab mould is omitted, so as to speed up the installation and to preventthe upper floor slab being loaded on the lower floor slab. However, thiserection method still has to wait a certain period of time until thefloor slab becomes hard enough to support its deadweight, then the floorslab mould can be taken away.

The present invention has arisen to mitigate and/or obviate theafore-described disadvantages.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide an erectionunit for a building floor slab and the erection method thereof, which iscapable of taking off the floor slab mould and installing the next lowerlayer after the floor slab is solidified to a certain level. Thus, notonly the installation speed is increased, but also the quality of thefloor slab is improved.

The erection unit for a building floor slab in accordance with thepresent invention includes a load-bearing member for lifting the floorslab, said load-bearing member located higher than a plane where thefloor slab lies and connected to the floor slab through a tractionmember.

the mounting member can be a mounting block fixed on the wall throughscrew bolt or can be a truss of the positioning member supporting theupper floor slab or can be a traction member pulling the upper floorslab.

The traction member can be tension rod, threaded rod, steel cord or ironchain.

The method for erecting floor slab in accordance with the presentinvention includes the following processes: installing the floor slabmould and reinforced bars, connecting the upper end of a traction memberto a load-bearing member above the floor slab; placing a lower end ofthe traction member on a height where the floor slab is located; thenpouring concrete; dismantling the floor slab mould and installing thenext lower layer after the floor slab is solidified to a certain level;taking off the traction member after the floor has solidified to astrength enough to support its deadweight.

By using the erection unit for a building floor slab and the erectionmethod in accordance with the present invention, the floor slab will notpressed by the upper floor slab during the solidification process, sothat the lower floor slab is prevented from deformation caused by theweight of the upper floor slab. Furthermore, by the aid of the tractionmember, the floor slab mould can be taken off and the next lower floorslab can be installed before the floor slab is completely solidified,thus the installation speed is substantially increased. Since theinstallation of the floor slab is carried out starting from the toplayer to the lower layer, after taking off the floor slab mould, thefloor slab can be easily lowered to and installed on the next layerunder the effect of gravity by using the traction member, so that theinstallation and transportation of the floor slab mould is simplified.

The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawings,which show, for purpose of illustrations only, the preferred embodimentsin accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic plan view for showing the conventional erectionmethod for erecting the floor slab;

FIG. 2 is a first schematic plan view for showing the installationprocess for the floor slab in accordance with a first embodiment of thepresent invention;

FIG. 3 is a second schematic plan view for showing the installationprocess for the floor slab in accordance with the first embodiment ofthe present invention;

FIG. 4 is a third schematic plan view for showing the installationprocess for the floor slab in accordance with the first embodiment ofthe present invention;

FIG. 5 is a fourth schematic plan view for showing the installationprocess for the floor slab in accordance with the first embodiment ofthe present invention;

FIG. 6 is a top view of the first embodiment of the present invention;

FIG. 7 is an enlarged view of the portion “A” in FIG. 1;

FIG. 8 is a structural view of a second embodiment of the presentinvention;

FIG. 9 is an enlarged view of the part “B” in FIG. 8;

FIG. 10 is an enlarged view of the part “C” in FIG. 8;

FIG. 11 is a structural view of a third embodiment of the presentinvention;

FIG. 12 is an enlarged view of the part “D” in FIG. 11;

FIG. 13 is an enlarged view of the part “E” in FIG. 11;

FIG. 14 is a structural view of a fourth embodiment of the presentinvention;

FIG. 15 is an enlarged view of the part “F” in FIG. 14;

FIG. 16 is an enlarged view of the part “G” in FIG. 14;

FIG. 17 is a structural view of a fifth embodiment of the presentinvention;

FIG. 18 is an enlarged view of the part “H” in FIG. 17;

FIG. 19 is a structural view of a sixth embodiment of the presentinvention;

FIG. 20 is an enlarged view of the part “I” in FIG. 19;

FIG. 21 is a structural view of a seventh embodiment of the presentinvention;

FIG. 22 is an enlarged view of the part “J” in FIG. 21.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

An erection unit for quick erection of a building floor slab and theerection method thereof in accordance with the present invention can beused in various ways, such as that disclosed in SIPO patent No.01,129,796, which is illustrated as follows:

Referring to FIG. 2, a first plurality of positioning members 5 arefixed at a height where a floor slab 3 is to be installed, and a floorslab mould 4 is then installed on the first plurality of positioningmembers 5. Through a plurality of traction members 6, a supportingstructure 8 is hung on a lower end of the positioning member 5 andemployed to support the floor slab mould 4. The floor slab 3 is then tobe cast by pouring concrete into the floor slab mould 4. Before pouringconcrete, a plurality of tension rods 2 having a threaded head 10 attheir lower end are obliquely inserted, from the above, into the floorslab mould 4 in a manner that upper hook ends of the tension rods 2 arehung on a plurality of load-bearing members that are mounting members 1on the wall 9 (as shown in FIGS. 2 and 7). After the concrete is pouredand cured to a certain extent, a second plurality of positioning members5 are re-installed at a position of the lower floor, and the supportingmember 8 and the floor-slab mould 4 are connected to the secondplurality of positioning members 5 through the traction members 6. Thefloor slab 3, after being cast, is pulled by plural tension rods 2. Thenthe mounting members 1 is dismantled, after the floor slab 3 is cured,and the tension rods 2 are taken away while leaving the threaded head 10in the floor slab mould 4. The holes left during the installation of thefloor slab are filled up with cement.

Referring to FIG. 3, the first plurality of positioning members 5 aredismantled before casting the next lower floor slab, so that thesupporting frame 8 and the floor slab mould 4 are loaded on the secondplurality positioning members 5. With reference to FIGS. 4 and 5, underthe effect of gravity and by the aid of the traction of the tractionmember 6, the floor slab mould 4 is lowered on the second mountingmember 5. After that, the installation for the next lower floor is to becarried out.

Referring to FIGS. 8, 9 and 10, which show an erection unit inaccordance with a second embodiment of the present invention, thetraction members 2 in this embodiment are hook-like tension rods. Afterinstallation of the floor slab mould 4 and the steel bar, an end of eachof the hook-shaped tension rods 2 is inserted in the floor slab 3 andfolded to into an angle, and another end of each of the tension rods 2is folded into a hook and connected to the steel bar 9′ on the wall 9.The tension rod 2 is obliquely arranged.

Referring to FIGS. 11, 12 and 13, which show an erection unit inaccordance with a third embodiment of the present invention, wherein aplate 7 is soldered with a connecting rod 14 to create a “T”-shapedmounting member that is to be inserted in the wall 9. A lower end of theconnecting rod 14 is formed with threads and protrudes out of the wall9, and alike, the connection between the traction member 6 and the floorslab 3 is also achieved through the “T”-shaped mounting member formed bythe plate 7 and the connecting rod 14. The traction member 6 can be inthe form of a sleeve 11 formed with threads.

The traction member shown in FIGS. 11-13 is a tension rod 2, both endsof the tension rod 2 are connected to the floor slab 3 and the wall 9,respectively, via the plate 7. The plate 7 is threadedly connected tothe tension rod 2.

Referring to FIGS. 14-16, which show an erection unit in accordance witha fourth embodiment of the present invention, both ends of the tensionrod 2 in this embodiment are folded into a hook and connected to thesteel bars 3′ of the floor slab 3 and to the steel bars 9′ on the wall9, respectively. The tension rod 2 is threadedly connected to the sleeve11, so that the tension rod 2 can be tensioned or released by rotatingthe sleeve 11 in different directions.

Referring to FIGS. 17 and 18, which show an erection unit in accordancewith a fifth embodiment of the present invention, a first end of areinforced bar 2′ is inserted through the uncured floor slab 3, and asecond end of which is connected to the load-bearing member above theuncured floor slab 3. In installation, the reinforced bar 2′ passesthrough the floor slab 3 before pouring concrete, and the concrete willinflate after being solidified and will produce pressure effect on thereinforced bar 2′. Since the reinforced bar 2′ is formed with lines andgrooves, when the uncured floor slab 3 is a little deformed under theeffect of gravity, the friction force generated between the reinforcedbar 2′ and the concrete will be greater enough to limit the deformationof the floor slab 3 within an acceptable range. When the load-bearingmember above the uncured floor slab 3 is connected to the truss of themounting member, an upper end of the reinforced bar 2′ is connected tothe truss while a lower end of the reinforced bar 2′ passes through theuncured floor slab 3. If the traction member above the uncured floorslab 3 is the traction member serving to pull the next upper floor slab,namely a reinforced bar 2′, then the reinforced bars 2′ are connected toeach other by soldering methods, and the soldering point is locatedabove the respective floor slabs.

Referring to FIGS. 19 and 20, which show an erection unit in accordancewith a sixth embodiment of the present invention, wherein the tractionmember in this embodiment is a steel cord 2″, a first end of which isconnected to the uncured floor slab 3 through an upper drop hanger 12,and a second end of which is connected to the load-bearing member abovethe uncured floor slab 3. A lower end of the upper drop hanger 12 isconnected with a wedge block 13 having a small upper end and a big lowerend, the wedge block 13 passes through the floor slab 3. A lower end ofthe wedge block 13 is connected with a lower drop hanger 12 which isused to tighten the steel cord 2″ by hanging weight, so that, afterpouring concrete, a pulling force can be produced to counteract theweight of the uncured floor slab 3. When the load-bearing member abovethe floor slab 3 is connected with the truss of the positioning member,the upper end of the steel cord 2″ is connected to the truss, and thelower end of the steel cord 2″ passes through the uncured floor slab 3through the wedge block 13. If the load-bearing member above the uncuredfloor slab 3 is the traction member of upper floor slab, the steel cord2″ is able to pass through plural floor slabs in a manner that therespective parts of the steel cord 22″ are connected with one another bythe drop hanger 12 and the wedge block 13.

Referring to FIGS. 21 and 22, which show an erection unit in accordancewith a sixth embodiment of the present invention, the traction member inthis embodiment is an iron chain 2, and other components are the same asthe above-mentioned six embodiments, thereby, further descriptions areomitted.

While we have shown and described various embodiments in accordance withthe present invention, it should be clear to those skilled in the artthat further embodiments may be made without departing from the scope ofthe present invention.

1. An erection unit for a building floor slab including a load-bearingmember for lifting the floor slab, said load-bearing member locatedhigher than a plane where the floor slab lies and connected to the floorslab through a traction member, the load-bearing member fixed to amounting member on wall of a building, wherein an upper end of thetraction member is connected to the mounting member through hooks. 2.The erection unit for a building floor slab as claimed in claim 1,wherein the mounting member is a mounting block fixed on the wallthrough screw bolt, and the mounting member can be a steel bar on thewall.
 3. The erection unit for a building floor slab as claimed in claim1, wherein the mounting member comprises a plate and a connecting rodwhich are connected with each other to form in the shape of a “T”, upperend of the plate and the connecting rod are located inside the wall, alower end of the connecting rod protrudes out of the wall.
 4. Theerection unit for a building floor slab as claimed in claim 3, whereinthe connecting rod is threadedly connected to the traction member. 5.The erection unit for a building floor slab as claimed in claims 1,wherein the traction member is a tension rod.
 6. The erection unit for abuilding floor slab as claimed in claims 3, wherein the traction memberis a tension rod.
 7. The erection unit for a building floor slab asclaimed in claim 1, wherein the load-bearing member is a truss connectedto a positioning member that is employed to support an upper floor slabmould.
 8. The erection unit for a building floor slab as claimed inclaim 1, wherein the traction member is a reinforced bar whose lower endis folded after inserting through the floor slab, and the tractionmember also can be connected to a plate after passing through the floorslab.
 9. The erection unit for a building floor slab as claimed in claim6, wherein the traction member is a reinforced bar whose lower end isfolded after inserting through the floor slab, and the traction memberalso can be connected to a plate after passing through the floor slab.10. The erection unit for a building floor slab as claimed in claim 6,wherein the traction member is a steel cord, and it also can be an ironchain.
 11. The erection unit for a building floor slab as claimed inclaim 7, wherein the plate is threadedly connected to the tractionmember.
 12. The erection unit for a building floor slab as claimed inclaim 1, wherein the load-bearing member is the traction member forpulling the upper floor slab.
 13. The erection unit for a building floorslab as claimed in claim 10, wherein the traction member is thereinforced bar, an upper end of the reinforced bar is connected to alower end of another reinforced bar for pulling the upper floor slab,and a lower end of the reinforced bar passes through the floor slab. 14.The erection unit for a building floor slab as claimed in claim 11,wherein the reinforced bars are connected to each other by soldering.15. The erection unit for a building floor slab as claimed in claim 10,wherein the traction member is the steel cord and also can be the ironchain passing through the floor slab, the traction members are connectedto each other by hook structure.
 16. The erection unit for a buildingfloor slab as claimed in claims 8, wherein a lower end of the steel cordor the iron chain is connected with a wedge block which is inserted inthe floor slab, a lower end of the wedge block is provided with a drophanger for hanging weight.
 17. The erection unit for a building floorslab as claimed in claims 13, wherein a lower end of the steel cord orthe iron chain is connected with a wedge block which is inserted in thefloor slab, a lower end of the wedge block is provided with a drophanger for hanging weight.
 18. A method for erecting floor slabincluding the following processes: installing the floor slab mould andreinforced bars, connecting the upper end of a traction member to aload-bearing member above the floor slab; placing a lower end of thetraction member on a height where the floor slab is located; thenpouring concrete; dismantling the floor slab mould and installing thenext lower layer after the floor slab is solidified to a certain level;taking off the traction member after the floor has solidified to astrength enough to support its deadweight.
 19. The method for erectingfloor slab as claimed in claim 15, wherein a positioning member is fixedon the wall initially, and then the floor slab mould is pressed on thepositioning member.
 20. The method for erecting floor slab as claimed inclaim 15, wherein the upper end of the traction member is fixed on thewall above the floor slab, the lower end of the traction member isconnected to the reinforced steel in the floor slab mould, the tractionmember is slantingly arranged.
 21. The method for erecting floor slab asclaimed in claim 15, wherein the upper end of the traction member isconnected to the truss of the positioning member that serves to supportthe upper floor slab.
 22. The method for erecting floor slab as claimedin claim 15, wherein the upper end of the traction member is connectedto the traction member that serves to pull the upper floor slab, thelower end of the traction member passes through the floor slab, and thetraction member is obliquely arranged.